Hair Test Interpretation: Finding Hidden Toxicities
by Andrew Hall
Cutler,
PhD, PE
© 2004, 2008, 2009
Andrew Hall
Cutler
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When mineral transport is
orderly,
hair selenium appears to accurately reflect at least intake and
probably body
burden as long as you don’t use a selenium or sulfur containing
anti-dandruff
shampoo (for example, Selsun Blue® or the selenium sulfide containing
version
of Head and Shoulders®).
Contamination of hair
samples by
dandruff shampoos containing selenium or sulfur – which is sometimes
contaminated with selenium – is quite common and accounts for most
observed
very high hair selenium levels.
...
The toxic level of
selenium is only
about 15 times higher than the level needed for adequate nutritional
intake. Only copper has a narrower
window between minimum required levels and toxicity.
A few people start to experience mild symptoms of selenium
toxicity at an intake as low as 750 mcg a day (on an adult basis).
...
Selenium deficiency causes aching
muscles, heart muscle weakness and heart disease. It
can also contribute to sensitivity to the toxic effects
of arsenic and mercury and perhaps other heavy metals at lower than the
usual
toxic levels.
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